Structural frame



FIG. 1 is a top front perspective view of a structural frame of a new, original, and ornamental design;

FIG. 2 is a front side elevational view of a structural frame thereof, with a rear elevational view being a mirror image of FIG. 2. of a new, original, and ornamental design;

FIG. 3 is a right side elevational view of a structural frame thereof, with a left side elevational view being a mirror image of FIG. 3 of a new, original, and ornamental design;

FIG. 4 is a top view of a structural frame of a new, original, and ornamental design; and,

FIG. 5 is a bottom view of a structural frame of a new, original, and ornamental design. 

CLAIM The ornamental design for a structural frame, as shown and described. 